the first one to come on has shot bearings and is noisey. the second fan to come on is fine.
is it as simple as remove both fans bin the s**t one and put the good one in the first ones place and plug it up?
are there different connections between the two?
does the system need to have the second fan plugged in to work properly?
thanks in advance for the advice
jim
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the world is changed by people in sheds